Process of waterproofing and craping paper.



Fries,

JAMES ARKELL, OF OANAJOHARIE, NEW YORK, ASSIGNOR TO SARAH HALL ARKELL, OE SAME PLACE.

PROCESS OF WATERPROOFING AND CRAPING PAPER.

SPECIFICATION forming part Of Letters Patent N0. 670,393, dated March 19, 1901.

Application filed January 19,1901. Serial No. 43,919. (No specimens.)

To ally/ham it may concern: waterproofing material, the application of Be it known that 1, JAMES ARKELL, a citiwhich constitutes the next step in the proczen of the United States of America, and a ess. This material, which is preferably parresident of Oanajohariein the county ofMontaffin, is deposited in any suitable wayupon 5 gomery and State of New York, have invented one or both sides of the fabric. My preferred certain new and useful Improvement'sin Procmethod of conducting these steps of the processes of Waterproofing and Oraping Paper,of ess is to pass the paper first through a vat of which the following is a specification. Water and then through a vat of melted par- This invention relates to the art of making affin. The paperis then passed between rolls,

1o waterproofcrapeorcrinkled paper, the object which move to a suitable extent whatever of the invention being an expeditious and surplusage or excess of water and paraffin economical process whereby the paper shall may have been taken up. The paper is then bev made both flexible and waterproof. craped or crinkled in any well-known way, 6 Among the chief difficulties encountered in after which the paper is dried, thus complet- 15 the production of this paper is that of applying the process.

ing a suitable amount of the waterproofing One effect of the craping operation as it is material uniformly over thefabric in conneccommonly performed is to break up or at tion with the craping operation without lessleast to disturb more or less the continuity or ening the flexibility of the craped product uniformity of the coating orimpregnation of 20 and with due economy of time, apparatus, paraffin, and in order to restore that conand Waterproofing material. If the paper is tinuity and uniformity the drying operation first craped, the Wrinkles and corrugations is preferably conducted at a temperature are liable to take up an excessive and unwhich is sufficient to melt the paraffin, which evenly distributed amount of the subsethen flows sufficiently to restore and renew 25 quently-applied waterproofing material. On those portions of the waterproofing which may the other hand,if the waterproofing material have been removed, cracked, or otherwise is applied before the craping or crinkling opdisturbed by the craping operation. eration that operation is liable to break or When paper of a moderate thickness is disturb the continuity and uniformity of the dampened on one side only, or so that the 0 coating or impregnated film of the waterdampness penetrates only part way through proofing material. In any case itis necessary, the paper, the paraffin or other waterproofing from considerations both of economy and material when applied to the other side will utility, to employ the minimum adequate enter the paper until it reaches or meets the amount of waterproofing material and to propdampened stratum, which checks the further 5 erly apply it to the fabric of the paper. Unpenetration of the paraffin. Therefore in less properly applied or if the film of wateremploying this process upon paper which is proofing material be too thick it is liable to to be'waterproofed only upon one side the I crack or flake off in the subsequent manipudepth of the waterproofing may be determined lation or use of the paper. or regulated by regulating the depth to which 40 My improved process consists in moistenthe paper is dampened prior to applying the ing the paper, then coating or impregnating waterproofing material. it with a suitable amount of waterproofing The best results of this process are obtained material, and then craping and drying the by keeping the water and the paraffin at a 5 paper, preferably conducting the drying opfairly high temperature, so as to avoid chill- 5 oration ata temperature sufficient to melt the ing the latter before it has become properly waterproofing material. incorporated with the paper fabric. Where,

In the practical employment of this process as is recommended, the paper is passed Iproceed substantially as follows: The paper through a body of Water and a body of par- I00 is first dampened, preferably with water, to affin, means should be provided for properly 50 a suitable extent, according to the thickness, and uniformly squeezing out or otherwise of the paper and according to the extent to removing the surplusage of water and parwhich it is desired to impregnate it with the affin. I prefer to do this by means of rolls between which the paper is passed and which operate to squeeze out the said surplusage, means being provided for regulating and maintaining a suitable pressn re between the rolls. The paper after passing through the water may pass between one pair of these rolls, then pass through the paraffin, and then through another pair of rolls, or the paper may bepassed through water and through paraffin and then through a pair of rolls, which squeezes out the surplusage, both of water and paraflimatone operation. In many similar ways the details of manipulation may be varied or modified to suit the nature of the work, the apparatus to be employed, or the results to be attained.

Paper of the proper quality when treated by this process shows no visible evidence of paraffin, does not flake or crack, is flexible and elastic, and resists water for a length of time sufficient for practical purposes.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The process of making waterproof flexithrough melted paraffin, then removing the excess of water and parallin, then craping the paper, and then drying the paper at a temperature suflicient to melt the paraflin and expel the water.

Signed at Oanajoharie, New York, this 17th day of January, 1901.

JAMES ARKELL. lVitnesses:

CORNELIA B. SMITH, MAGGIE BLoss. 

